CTAN update: siunitx

Joseph Wright submitted an update to the

                siunitx

package.

Version: 3.3.21 2024-08-20
License: lppl1.3c

Summary description: A comprehensive (SI) units package

Announcement text:
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## [v3.3.21] - 2024-08-20

### Fixed
- Conversion of negative angles to arc notation (see issue
  [\#743](https://github.com/josephwright/siunitx/issues/743))
- Rounding of angles in arc mode (see issue
  [\#744](https://github.com/josephwright/siunitx/issues/744))
- Polar form of negative real values (see issue
  [\#745](https://github.com/josephwright/siunitx/issues/745))

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This package is located at
   https://mirrors.ctan.org/macros/latex/contrib/siunitx

More information is at
   https://www.ctan.org/pkg/siunitx


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   Thanks for the upload.

     For the CTAN Team
    Manfred Lotz


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